Patents Assigned to Hercules
  • Patent number: 5340644
    Abstract: A crosslinked organosilicon polymer or crosslinkable organosilicon prepolymer comprising:(A) alternating (a) cyclic polysiloxane or tetrahedral siloxysilane residues and (b) polycyclic hydrocarbon residues derived from polycyclic polyenes having at least two non-aromatic, non-conjugated carbon-carbon double bonds in their rings linked through carbon to silicon bonds, wherein at least one of the cyclic polysiloxanes or tetrahedral siloxysilanes (a) or the polycyclic polyenes (b) used to form the polymer or prepolymer has more than two reactive sites;(B) up to 85%, by weight, filler; and(C) at least one reaction rate modifier selected from the group consisting of alkyl diamines, alkyl triamines, alkyl tetraamines and alkyl pentaamines.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: August 23, 1994
    Assignee: Hercules Incorporated
    Inventors: Laura M. Babcock, Richard L. Brady, Julia S. Burnier
  • Patent number: 5341103
    Abstract: Apparatus for simultaneously generating and measuring a triboelectric charge generated on a strip of flexible sample material includes a stationary rod of insulating material, driving motor for the sample material adapted to move the sample material in frictional contact with the rod, a support rod for maintaining a surface of the sample material in straight-line tangential relationship with the rod, and a static-charge sensor disposed between the stationary rod and the support rod and spaced from the surface of the sample material for measuring a charge on the surface in cooperation with a voltage-measuring device.
    Type: Grant
    Filed: June 4, 1992
    Date of Patent: August 23, 1994
    Assignee: Hercules Incorporated
    Inventors: Sunil P. Dasgupta, Blain H. Gingrich, Bernard J. Matyniak, G. Gregory Weaver
  • Patent number: 5338406
    Abstract: A polyelectrolyte complex comprising at least one water-soluble, linear, high molecular weight, low charge density cationic polymer having a reduced specific viscosity greater than 2 deciliters/gram (at 0.05 weight % in a 2M NaCl solution at 30.degree. C.) and a charge density of 0.2 to 4 milliequivalents/gram (meq/g), and at least one water-soluble, anionic polymer having a charge density less than 5 meq/g, an aqueous system comprising the polyelectrolyte complex, a composition comprising the polymers which form the polyelectrolyte complex, and paper comprising the polyelectrolyte complex. It is also directed to a process comprising (1) forming an aqueous suspension of cellulosic fibers; (2) adding a strengthening additive so that the aforementioned polyelectrolyte complex is incorporated into the aqueous suspension of cellulosic fibers; and (3) sheeting and drying the fibers to form the desired cellulosic web.
    Type: Grant
    Filed: September 10, 1992
    Date of Patent: August 16, 1994
    Assignee: Hercules Incorporated
    Inventor: Douglas C. Smith
  • Patent number: 5338807
    Abstract: A creping aid comprising the reaction product of a polyamide of a dibasic acid or of the ester of an aliphatic dibasic acid and methyl bis(3-aminopropylamine) with epichlorohydrin in a mole ratio of the polyamide to the epichlorohydrin between about 1:0.1 and about 1:0.33, and a composition comprising an aqueous solution of the creping aid.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: August 16, 1994
    Assignee: Hercules Incorporated
    Inventors: Herbert H. Espy, William W. Maslanka
  • Patent number: 5338407
    Abstract: A process for making paper to enhance the dry strength of the paper produced without reducing its softness, that comprises adding to a bleached pulp furnish a mixture of an anionic carboxymethyl guar or a carboxymethyl hydroxyethyl guar with a cationic guar that may be prepared by reacting a natural guar with caustic and subsequently with quaternary ammonium chloride.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: August 16, 1994
    Assignee: Hercules Incorporated
    Inventor: Sunil P. Dasgupta
  • Patent number: 5334177
    Abstract: A core component for use in a fluid-absorbing article, such as a diaper, incontinence pad, catamenial device or the like is described, which core component has a plurality of core zones comprising a zone of vulnerability positioned in said core component for maximum potential exposure to wetting, and at least one additional core zone arranged in an area of reduced potential exposure to initial wetting and in direct or indirect fluid receivable relation from the zone of vulnerability. The zone of vulnerability has a wadding component comprising synthetic fiber of filament and has a greater average pore size and greater average fractional value of fiber volume to fiber surface area than the average pore size and average fractional value of fiber volume to fiber surface area of the wadding component in the at least one additional core zone.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: August 2, 1994
    Assignee: Hercules Incorporated
    Inventor: Richmond R. Cohen
  • Patent number: 5334688
    Abstract: Disclosed are organosilicon crosslinked polymers and crosslinkable prepolymers that are the reaction product of (a) a cyclic polysiloxane in which each silicon atom is substituted with (i) a saturated, substituted or unsubstituted alkyl or alkoxy group or a substituted or unsubstituded aryl or aryloxy group, and (ii) a substituted or unsubstituted hydrocarbon group having at least one carbon-carbon double bond that is reactive in hydrosilation, (b) at least one organosilicon compound having at least two .tbd.SiH groups, and optionally (c) a hydrocarbon polyene having at least two nonaromatic carbon-carbon double bonds that are reactive in hydrosilation. A process for preparing the polymers and prepolymers and for preparing the cyclic polysiloxanes is also disclosed.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: August 2, 1994
    Assignee: Hercules Incorporated
    Inventor: De-Kai Loo
  • Patent number: 5330457
    Abstract: A fluid-absorbing article for personal use, such as a diaper or incontinence pad utilizing a core component having a plurality of contiguous zones comprising(a) a zone of vulnerability arranged within said core component for maximum potential exposure to wetting and(b) a plurality of intermediate zones in direct or indirect fluid receivable relation from the zone of vulnerability in areas of reduced potential exposure to initial wetting; the corresponding core component; and a method for increasing fluid receptivity and fluid storage efficiency plus reduced rewet characteristics of core components by use of intermediate zones as described.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: July 19, 1994
    Assignee: Hercules Incorporated
    Inventor: Richmond R. Cohen
  • Patent number: 5326865
    Abstract: Arylazo and poly(arylazo) dyes having at least one core radical selected from naphthyl or anthracyl and having at least one 2,3-dihydro-1,3-dialkyl perimidine substituent, a guest-host composition comprising a liquid crystal host solvent and the arylazo or poly(arylazo) dichroic dye, and a liquid crystal display comprising the guest-host composition, are disclosed.
    Type: Grant
    Filed: June 8, 1990
    Date of Patent: July 5, 1994
    Assignee: Hercules Incorporated
    Inventors: Robert P. Grasso, Michael K. O'Brien, Paul J. Shannon
  • Patent number: 5323707
    Abstract: A multi-layered cylindrical propellant casing comprising an inner propellant-holding layer of polymer layer(s) obtained by lay up, blow molding, or similar fabrication of an energetic or nonenergetic type layer, coated with (an) intermediate adhesive layer(s) of an energetic or non-energetic type, and covered by an outer, concentrically arranged, coat or layer having a higher resistance, than said inner layer, to circumferential expansion; plus a corresponding method for increasing the amount of fragmentation and combustion rate of such propellant casing when exposed to a firing sequence.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: June 28, 1994
    Assignee: Hercules Incorporated
    Inventors: Richard V. Norton, William J. Worrell, Jr.
  • Patent number: 5324531
    Abstract: A fat simulating composition is composed of a substantial portion of elongated, irregularly shaped carbohydrate gel particles having a longest axial dimension of up to 250 microns with a mean volume diameter ranging from about 10 microns to about 100 microns; the particles are in a hydrated state so as to have the substantially smooth organoleptic character of an oil emulsion. This fat simulating product is substituted in foods for all or a portion of the fat and/or oil used in that food product.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: June 28, 1994
    Assignee: Hercules Incorporated
    Inventors: Andrew C. Hoefler, Julia A. Sleap, Jens E. Trudso
  • Patent number: 5324467
    Abstract: A process for the preparation of an oriented multilayer laminate film having at least three layers, said method including: (a) extruding in a molten state (i) polypropylene selected from a homopolymer or a copolymer of propylene wherein said copolymer comprises an alkene monomer having 2 or 4-6 carbons; (ii) adhesive; and (iii) co-polyester of a polyesterification reaction product where the reactants are at least one glycol and at least one dibasic acid with the total reactants being at least three of the glycols and dibasic acids, (b) laminating (i), (ii) and (iii) together in the molten state to form the film; (c) cooling the film; (d) drawing the film in a temperature range that allows orienting without breaking; and (e) heat setting the oriented film.
    Type: Grant
    Filed: November 9, 1992
    Date of Patent: June 28, 1994
    Assignee: Hercules Incorporated
    Inventor: Harry S. Anderson, II
  • Patent number: 5319379
    Abstract: A dual polarized mechanical scan antenna capable of rapid beam scanning includes a parabolic reflector having an elliptically shaped solid metal central section with conductive parallel grids extending therefrom to the perimeter of the paraboloid to form two outer grided sections. The axis of the parabolic reflector and the radiation axis of the feed antenna, positioned at the focus in alignment therewith, is positioned at a predetermined angle from a reference axis of the system. A polarization twist reflector is positioned at the focus for pivoting about the perpendicular to the reference axis. Dual polarization is realized when the twist plate is positioned such that the antenna system receives signals along paths that clear the parabolic reflector.
    Type: Grant
    Filed: August 24, 1984
    Date of Patent: June 7, 1994
    Assignee: Hercules Defense Electronics Systems, Inc.
    Inventors: David R. Waken, Tyson S. Craven
  • Patent number: 5319042
    Abstract: This invention relates to a two component catalyst system for the polymerization of metathesis polymerizable cycloolefins, comprising (a) a tungsten compound of the formula WOX.sub.4-x (OAr).sub.x where X is chlorine, bromine or fluorine, Ar is a hindered phenyl ring having 1-5 specified substituents and x = 1, 2 or 3; and (b) an activator compound.Among the preferred molecules or groups that are substituted on the phenyl ring of the tungsten compound are phenyl, chlorine, bromine, methoxy and isopropyl groups. Ar can also represent a multi-substituted phenyl group such as 2,4-dichloro-6-methylphenyl.
    Type: Grant
    Filed: October 18, 1991
    Date of Patent: June 7, 1994
    Assignee: Hercules Incorporated
    Inventor: Andrew Bell
  • Patent number: 5318735
    Abstract: Radial differential melt flow rate melt spun fiber, preparation thereof utilizing threadline oxidative chain scission degradation of hot fiber extruded from polyolefin polymer component(s) having a broad molecular weight distribution in conjunction with a delayed or slow quench step, and corresponding high strength nonwoven material obtained therefrom.
    Type: Grant
    Filed: April 11, 1991
    Date of Patent: June 7, 1994
    Assignee: Hercules Incorporated
    Inventor: Randall E. Kozulla
  • Patent number: 5319048
    Abstract: A new composition of matter that can be substituted as a bulking agent for sugar or starch to reduce the caloric content of foods comprising the polymeric product of the reaction of a water-soluble polyol with a di- or tri-epoxide, in water containing a water-soluble inorganic base that serves as a catalyst, and the process for making it.
    Type: Grant
    Filed: December 30, 1991
    Date of Patent: June 7, 1994
    Assignee: Hercules Incorporated
    Inventors: Lawrence C. Carosino, Anthony B. Clayton
  • Patent number: 5318669
    Abstract: A process for making paper to enhance the dry strength of the paper produced without substantially reducing its softness comprising adding to a bleached pulp furnish, separately or together, (1) an anionic polymer selected from the group consisting of carboxymethyl guar, carboxymethyl bean gum, carboxymethyl hydroxyethyl guar, and a carboxymethyl hydroxypropyl guar, with (2) a cationic polymer selected from the group consisting of a cationic guar, a cationic acrylamide copolymer, a cationic bean gum, a cationic amineepichlorohydrin wet strength resin, and both a cationic wet strength resin and at least one of the other said cationic polymers, a composition for adding to a paper-making pulp slurry comprising the said polymers, a method for making the said composition, and a paper product containing the said composition, are disclosed.
    Type: Grant
    Filed: August 14, 1992
    Date of Patent: June 7, 1994
    Assignee: Hercules Incorporated
    Inventor: Sunil P. Dasgupta
  • Patent number: 5316623
    Abstract: A method for imparting wet strength to paper with improved water absorbency, that comprises adding to an aqueous suspension of cellulosic paper stock a neutral or alkaline-curing thermosetting wet-strength resin, a water-soluble polymer containing carboxyl groups or carboxylate ions as their alkali metal or ammonium salts, and a substantially non-thermosetting tertiary-amino polyamide-epichlorohydrin resin.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: May 31, 1994
    Assignee: Hercules Incorporated
    Inventor: Herbert H. Espy
  • Patent number: 5310433
    Abstract: An efficient method for preparing nitrated glycerol glycol ether useful as a high energy plasticizer, by using as nitrator feed, the reaction products of an alkali metal bisulfate-catalyzed reaction of ethylene oxide and a stoichiometric excess of glycerol.
    Type: Grant
    Filed: December 24, 1987
    Date of Patent: May 10, 1994
    Assignee: Hercules Incorporated
    Inventors: Lawrence E. Carosino, Kenneth O. Hartman
  • Patent number: 5299926
    Abstract: A novel spinning apparatus is provided with a tubular coagulating liquid flow control valve body made of an elastomeric material and whose inner diameter is changeable according to external pressure. The valve body has a simple structure and is easy to retrofit to a conventional spinning apparatus. When dope is extruded, a mass of dope with gelled skin can pass easily and quickly through the opened valve body so that the spinning workability at the start of spinning is high. Further, since the coagulating liquid flows smoothly, the spinning speed can be increased without damaging the filaments.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: April 5, 1994
    Assignee: Sumika-Hercules Co., Ltd.
    Inventors: Shigeru Nakajima, Tadao Marui